I’m teaching superlatives

What is the most interesting place you have been to? Who is the most famous person in the world? What is the biggest country in the world? Which country has the largest population in the world? Which fruit has the strongest smell? What is the biggest problem in the world? What is the most expensive restaurant in your city? What is the best film you have ever seen? What is the most beautiful city? What is the most difficult language to learn? What is the most expensive thing you have ever bought for yourself? What is the most exciting sport to watch? What is the best country to live in? What is the most useful thing you have? What is the most difficult thing about studying English? What is the safest form of transport? What is the hardest subject?